router: Correctly generate application-relative URLs

src/milla/dispatch/routing.py

@@ -231,8 +231,8 @@ class Generator(object):
         '''
 
         path = '/'.join(str(s) for s in segments)
-        if not path.startswith('/'):
-            path = '/' + path
+        while path.startswith('/'):
+            path = path[1:]
 
         url = self.request.relative_url(path, to_application=True)
         if self.path_only: